在此基础上，探讨了关键结构体的理论框架，讨论了关键结构体的概念与存在条件、力学特性、空间形态、破断方式及其对应力场的影响。
The conception of key structural blocks, their prerequisites of presence, mechanical characteristics, spacial structure modes, failure modes, effect on stress are discussed also.
为查明活塞裙破断的原因，对活塞裙的断口、材质、装配应力、应力集中情况等进行了分析研究。
Analysis has been made on the fracture, material properties, assem-bling stress, stress concentration and etc. in order to find the cause of the rupture.
为查明活塞裙破断的原因，对活塞裙的断口、材质、装配应力、应力集中情况等进行了分析研究。
Analysis has been made on the fracture, material properties, assem-bling stress, stress concentration and etc. in order to find the cause of the rupture.
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